Improvement in fubnaces



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MARCUS L.' HORTON, OF WORCESTER, MASSACHUSETTS.

Lette/s Paten-t No. 74,536, dated February 18, 1868.

IMPROVEMENT IN IUBNAGES.

'ro ALL Pensons 'ro WHOM THESE PRESENTS iL/tir'coins=,

Re it known that I, MARCUS L. Heures, of the city and countyotWorcester, and State of'Massachusetts, have invented a new andruseful.Improvement-in Furnaces for the'cohxhustion of fuel; and I do herebprdeclare the same to be fully dcscribedin the following specification,and represented in the accompanying drawings, of which Figure 1 is a topvien,

Figure 2 alongitudinal and vertical section,

Figure 3 a transverse section, vand Figure 4 a front elevation of thesaid furnace.

Figure 5 is a longitudinal and vertical section, taken through thelire-proof lining of one side ofthe chamber of combustion: Y

Figure 6 is a horizontal section, taken through the grate.und thelateral air-chambers.

In such drawings A is the replace or chamber of combustion, providedwith awrotary grate, B, whose frame a, hars b b, 85o., and joilrn'alscc, are liollow or tubular, so as toallonair to pass into onejoutnal,thence'through the frame and the several bars, and thence through theother journal. Surrounding the ash-chamber G and the grate, on theirsides and rear ends', is an ,air-conduit or chamber, C, into which therear journal of the grate opens. This air'chamber has a perforated orfo'raminous top, d. @In front of the grate is another air-chamber, D,into which the other or front journallof the grate opens. The saidair-chamber D receives its air from two vertical conduits, H H, arrangedat its ends, and provided with inlets, which are shown lat e e in iig.4. Over and resting upon the foraminous cap d of the chamber Cislalfirc-brick or fire-proof lining, E, which is arched or channelled,as shown atf, directly over the fornminousfop. Within the fire-prooflining is a series of horizontal pipes, g cj g, which extend throughoutthe lining, and have numerous holes, z t It, leading out of themv andinto the chamber of combustion. Furthermore, these several pipes and thechannelf are connected by short vertical pipes, h2 It if, in order thatthe air, as* heated, may flow upward into and circulate through thepipes of the lire-proof lining, and be heated by caloric abstracted fromtheir inner surfaces. There should be doors to the fireplace andash-chamber mouths, and also dampers, registers, or doors to thenirLinlets, and there may alsoA be a damper in the discharge-flue of thefurnace. l

From the above it will be seen that, when there is fuel in a state ofcombustionin the fireplace, air will iioiv into the inlets e le, thenceinto the conduits H H, thence into the chamber D, thence through thegrate, 'thence inte and through thc'chamber C and out of the holes ofitsl top, thence into and through the several pipes of.

the fire-proof or fire-brick lining, and thence out of tli'cir orificesof discharge and into 'the chamber of combustion, and the fuel and gasesthat may he therein.' The' air thus introduced into the fuel, and forthe promotion and supportof combustion thereof, will, during its passagethrough the grate and passage of the fire-proof lining,

be very much heated, and will thereby facilitate the combustion of thefuel and gases.

The system of metallic pipes arranged in the tire-proof lining serves togive strength thereto, and to reduce` its temperature and-keep it intactunder the action of the lire;

What 'I claim as my invcntion, in the above-described improved furnace,is as follows:

I claim the combination as well as the arrangement of the air-chambers DC, and the grate made hollow, and with hollow journals to open into suchchambers respectively, es set` forth.

I also claim the arrangement of horizontal and vertical pipes orconduits of there-preof lining of the ircplace, suclrpipes beingarranged within such lining, and made to communicate with each otherand. the replace, and with the external atmosphere, so that air may flowinto and through the pipes and lining, and bc discharged into .thefireplace, as specified.

I also claim the combination of the system of pipes and air-passages inthe fire-proof lining with the airi chamber C, partially surrounding theash-chamber and grate, and made with a perforated top, as set forth.

I also claim the arrangement of the ,hollow grate and its hollowjournals, the induction and eduetion-air chambers D C, the fire-prooflining, and a'systcm of pipes or air-conduits arranged in such lining,and. made to communicate with the chamber C and the fireplace,substantially as specified.

MARGUS'L. Hoeren.

Witnesses:

' THEononn S. JOHNSON,

F. T. BnAcKMER.

